It made me feel like crap. It had me amped up for a couple hours though. I gave it to someone else and he trashed it because of how crap it made him feel. I was very stim tolerant at the time too. That, and I dunno wtf is in it.

Honestly not a big fan of Nitraflex. My performance blew balls on that shyt. After about 10 minutes working out I felt like I hit a brick wall and it didnt go away. I still have a tub of that stuff thats like 2 yrs old